Help- Return Early Pattern for Functions

Where am I going wrong?

Your code so far


// Setup
function abTest(a, b) {
  // Only change code below this line
if (a > 0 || b > 0) {
  return;
}
  
  
  // Only change code above this line

  return Math.round(Math.pow(Math.sqrt(a) + Math.sqrt(b), 2));
}

// Change values below to test your code
abTest(2,2);

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Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions

The challenge asks you to return undefined if a or b are negative. Your code is testing for them to be positive and it is not returning anything